# VU Meter Pro — Pro metering. Anywhere. > Professional audio metering tools for broadcast, streaming, and live sound. (iPhone/iPad app by Tomoaki Shimizu.) - Source: https://appshunter.io/ios/app/vu-meter-pro/id6761095884 (this page in markdown: same URL + `.md`) - Developer: [Tomoaki Shimizu](https://appshunter.io/developer/1887774608) - Category: Music, Utilities - Price: $9.99 - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 18.6 · 4 MB - Languages: American English - Released: 2026-04-10 - Data updated: 2026-08-29 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/vu-meter-pro/id6761095884/reviews.md ## What is VU Meter Pro? VU Meter Pro is a professional audio metering app for broadcast, streaming, and live sound. It combines an analog VU meter with a loudness meter, phase meter, LED bar meter, and waveform display. Arrange the meters you need on screen to match each on-site workflow. Connect any USB class-compliant device (audio interface, mixer, recorder, or the audio output of a camera or switcher) with a single USB cable and start measuring right away. Use it as a portable meter in the field, or as a fixed tool in the studio. Works on both iPhone and iPad. What it measures · Audio level (analog VU meter / LED bar) · Loudness (Momentary / Short-term / Integrated / True Peak / LRA) · Loudness history (graph display, up to 24 hours) · Waveform (Waveform Scope, up to 30-minute history, pinch-to-zoom) · Phase (Lissajous + correlation meter) Standards-based measurement Loudness measurement follows ITU-R BS.1770 and conforms to EBU R128 / EBU Mode (Tech 3341 and 3342) and ARIB TR-B32, at 48 and 96 kHz. Measurements are verified against reference signals. ITU-R BS.1770 is the measurement standard widely adopted by national broadcast loudness practices such as ATSC A/85 (US) and OP-59 (Australia), which target −24 LKFS. Loudness presets set the target and the True Peak limit in one tap: ARIB TR-B32, EBU R128, ATSC A/85 and OP-59 for broadcast, plus Spotify, YouTube and Apple Podcasts for streaming. Built for the field · Responsive, real-time metering · Standard and wide-range VU scales (−20 to +3 / −40 to +10) · Seven meter themes for different lighting conditions and preferences · LED bar colors: four presets, or set your own three zone colors · Peak Indicator with an adjustable True Peak threshold, so you can tell at a glance whether a peak occurred · Input Trim (±5 dB) for level calibration · Peak-hold readouts for easy reading at a glance Launch and measure. No setup required. This app is built and maintained by a working engineer in radio, audio, and video production, for use in the field. Visibility and operational reliability are the top priorities. Use with an external audio interface. The built-in microphone is not suitable for accurate measurement. ## Key features - VU meter - Loudness meter - Phase meter - LED bar meter - Waveform display - Configurable meter layout - USB audio interface support ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/vu-meter-pro/id6761095884/reviews.md ### 5/5 — Clean and presents as expected *2026-06-26* Looks great, works great. Exactly what you are looking for. Would be nice to spin up a couple of these for input and output signals. Small feature request would be to allow the window to be shrunk to whatever (smaller) size. Right now, when you shrink the window too small it locks to a specific hight/width ratio. If you only have the analog vu meter, shrink the window down, the window ends up forcing to have lots of black blank space above and below the meters. **Developer response:** Thank you for the kind words and the detailed feedback — much appreciated. Both points are noted: multiple meter instances for input/output monitoring, and more flexible window resizing (especially removing the empty space in the analog-VU-only layout). I built this app for my own work in broadcast, so requests coming from real-world use mean a lot to me. I've added them to my list for future updates. ## Frequently asked questions about VU Meter Pro ### What is VU Meter Pro? VU Meter Pro is a professional application designed for accurate audio metering in broadcast, streaming, and live sound environments. It offers a variety of meters including VU, loudness, phase, LED bar, and waveform displays. ### What audio measurements can VU Meter Pro provide? VU Meter Pro can measure audio levels (analog VU/LED bar), loudness (Momentary, Short-term, Integrated, True Peak, LRA), loudness history up to 24 hours, waveforms with up to 30-minute history, and phase correlation. ### Does VU Meter Pro require any setup? No, VU Meter Pro is designed for immediate use upon launching, requiring no complex setup. It's built for operational reliability and ease of use in the field. ### What devices does VU Meter Pro support? VU Meter Pro is compatible with both iPhone and iPad devices, offering flexibility for users across Apple's mobile ecosystem. ### How does VU Meter Pro connect to audio sources? The app supports connection with any USB class-compliant device, including mixers, recorders, cameras, and switchers, using a single USB cable for instant measurement. ### Is VU Meter Pro suitable for beginners? While designed for professionals, its straightforward interface and no-setup requirement make it accessible. However, understanding audio metering principles is beneficial for optimal use. ### What is the price of VU Meter Pro? VU Meter Pro is a paid application priced at $9.99. This one-time purchase provides access to all its professional metering features. ### How often is VU Meter Pro updated? The latest version, 1.2.5, was released on June 21, 2026, indicating recent development activity. Updates typically focus on improving reliability and adding features based on user feedback. ## Version history (last 5 releases) ### 1.6.1 — 2026-08-17 ・Updated the in-app help. ### 1.6 — 2026-08-15 ・ Loudness presets added. Set the target and true peak limit with a single tap. ・ Peak Indicator: the LED and true peak readout on the analog VU meters and the dedicated block at the end of the LED bar meter are now controlled by one setting, and are driven by true peak. ・ LED bar meter colors can now be selected. ・ VU Readout: the value on the right is now true peak (dBTP). ・ Settings: the VU tab is now Meters, reorganized into Analog VU / LED Bar / Both Meters. ・ Many other fixes and improvements ### 1.5 — 2026-07-18 · Significantly improved input latency for more responsive metering in live settings. · Added a wide-range VU display (−40 to +10) for checking wider dynamic range. · Added the NAVY meter theme. · Expanded the Input Trim range from ±1 dB to ±5 dB. · Improved loudness measurement accuracy (True Peak / LRA / Integrated), revised to follow the ITU-R BS.1770 and EBU standards more strictly. · Fixed an issue where LRA was not displayed correctly at 96 kHz. · Fixed an issue where loudness history stopped recording while the Settings screen was open. · Added Japanese help text, switchable within the Help screen (iPad). · Various UI refinements. ### 1.2.5 — 2026-06-21 - Stability improvements through internal optimization ### 1.2 — 2026-06-02 New Feature: Input Trim Correct slight L/R channel imbalance. - Independent L/R adjustment, ±1.00 dB in 0.05 dB steps - Floating calibration panel — adjust while watching the VU needle - A status bar indicator stays visible while trim is active - Trim values are saved per device Open Settings → Input → Calibrate to begin. Fixes - Fixed an issue where settings pickers could become unresponsive after changing the Hardware Sample Rate. ## More apps by Tomoaki Shimizu - [Time Director Pro](https://appshunter.io/ios/app/time-director-pro/id6769760912) All apps by Tomoaki Shimizu: https://appshunter.io/developer/1887774608 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*